The full May Ranking of the Top 10 Podcast Publishers is now available at Podtrac.com.

Highlights of the May Ranking include:

The Washington Post debuts at #10 with a U.S. Unique Audience of just under 1.4 million.

Six of the ten publishers showed increases in their U.S. unique audience over April with three publishers posting double digit gains: HowStuffWorks (48%), Washington Post (28%) and New York Times (18%).

Total Global Unique Streams and Downloads for the group of Top 10 publishers is flat for May 2017 (250,700,000) over April 2017 (250,401,000) .

Comparing year-over-year data all six publishers who were on both the May 2016 and May 2017 rankings show double digit year-over-year growth, with HowStuffWorks (71%) and NPR (63%) showing the biggest gains.

Podtrac's ranking of the Top 20 Podcasts based on U.S. Unique Monthly Audience for April 2017 is now available at Podtrac.com.

S-Town, the new podcast from This American Life and Serial, tops the April list up from #4 in March. S-Town broke the record of fastest growing podcast with an average of 5.6 million downloads per episode in its first 30 days.

Visit Podtrac.com to sign-up to receive monthly updates to Podtrac's Top 20 Podcasts and Top 10 Podcast Publishers ranking reports.